btrfs-progs/print-tree.c

171 lines
4.8 KiB
C
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#include <stdio.h>
#include <stdlib.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
static int print_dir_item(struct btrfs_item *item,
struct btrfs_dir_item *di)
{
u32 total;
u32 cur = 0;
u32 len;
total = btrfs_item_size(item);
while(cur < total) {
printf("\t\tdir index %Lu flags %u type %u\n",
btrfs_disk_key_objectid(&di->location),
btrfs_dir_flags(di),
btrfs_dir_type(di));
printf("\t\tname %.*s\n",
btrfs_dir_name_len(di),(char *)(di + 1));
len = sizeof(*di) + btrfs_dir_name_len(di);
di = (struct btrfs_dir_item *)((char *)di + len);
cur += len;
}
return 0;
}
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void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
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{
int i;
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u32 nr = btrfs_header_nritems(&l->header);
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struct btrfs_item *item;
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struct btrfs_extent_item *ei;
struct btrfs_root_item *ri;
struct btrfs_dir_item *di;
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struct btrfs_device_item *devi;
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struct btrfs_inode_item *ii;
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struct btrfs_file_extent_item *fi;
struct btrfs_csum_item *ci;
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char *p;
u32 type;
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printf("leaf %Lu ptrs %d free space %d generation %Lu\n",
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btrfs_header_blocknr(&l->header), nr,
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btrfs_leaf_free_space(root, l),
btrfs_header_generation(&l->header));
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fflush(stdout);
for (i = 0 ; i < nr ; i++) {
item = l->items + i;
type = btrfs_disk_key_type(&item->key);
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printf("\titem %d key (%Lu %x %Lu) itemoff %d itemsize %d\n",
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i,
btrfs_disk_key_objectid(&item->key),
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btrfs_disk_key_flags(&item->key),
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btrfs_disk_key_offset(&item->key),
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btrfs_item_offset(item),
btrfs_item_size(item));
switch (type) {
case BTRFS_INODE_ITEM_KEY:
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ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
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printf("\t\tinode generation %Lu size %Lu mode %o\n",
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btrfs_inode_generation(ii),
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btrfs_inode_size(ii),
btrfs_inode_mode(ii));
break;
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case BTRFS_INLINE_DATA_KEY:
p = btrfs_item_ptr(l, i, char);
printf("\t\tinline data %.*s\n", 10, p);
break;
case BTRFS_DIR_ITEM_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l->items + i, di);
break;
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case BTRFS_DIR_INDEX_KEY:
di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
print_dir_item(l->items + i, di);
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break;
case BTRFS_ROOT_ITEM_KEY:
ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
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printf("\t\troot data blocknr %Lu dirid %Lu refs %u\n",
btrfs_root_blocknr(ri),
btrfs_root_dirid(ri),
btrfs_root_refs(ri));
break;
case BTRFS_EXTENT_ITEM_KEY:
ei = btrfs_item_ptr(l, i, struct btrfs_extent_item);
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printf("\t\textent data refs %u\n",
btrfs_extent_refs(ei));
break;
case BTRFS_CSUM_ITEM_KEY:
ci = btrfs_item_ptr(l, i,
struct btrfs_csum_item);
printf("\t\tcsum item\n");
break;
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case BTRFS_EXTENT_DATA_KEY:
fi = btrfs_item_ptr(l, i,
struct btrfs_file_extent_item);
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if (btrfs_file_extent_type(fi) ==
BTRFS_FILE_EXTENT_INLINE) {
printf("\t\tinline extent data size %u\n",
btrfs_file_extent_inline_len(l->items + i));
break;
}
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printf("\t\textent data disk block %Lu nr %Lu\n",
btrfs_file_extent_disk_blocknr(fi),
btrfs_file_extent_disk_num_blocks(fi));
printf("\t\textent data offset %Lu nr %Lu\n",
btrfs_file_extent_offset(fi),
btrfs_file_extent_num_blocks(fi));
break;
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case BTRFS_DEV_ITEM_KEY:
devi = btrfs_item_ptr(l, i, struct btrfs_device_item);
printf("\t\tdev id %Lu namelen %u name %.*s\n",
btrfs_device_id(devi),
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btrfs_device_pathlen(devi),
btrfs_device_pathlen(devi),
(char *)(devi + 1));
break;
case BTRFS_STRING_ITEM_KEY:
printf("\t\titem data %.*s\n", btrfs_item_size(item),
btrfs_leaf_data(l) + btrfs_item_offset(item));
break;
};
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fflush(stdout);
}
}
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void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
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{
int i;
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u32 nr;
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struct btrfs_node *c;
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if (!t)
return;
c = &t->node;
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nr = btrfs_header_nritems(&c->header);
if (btrfs_is_leaf(c)) {
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btrfs_print_leaf(root, (struct btrfs_leaf *)c);
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return;
}
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printf("node %Lu level %d ptrs %d free %u generation %Lu\n",
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t->blocknr,
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btrfs_header_level(&c->header), nr,
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(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
btrfs_header_generation(&c->header));
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fflush(stdout);
for (i = 0; i < nr; i++) {
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printf("\tkey %d (%Lu %x %Lu) block %Lu\n",
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i,
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c->ptrs[i].key.objectid,
c->ptrs[i].key.flags,
c->ptrs[i].key.offset,
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btrfs_node_blockptr(c, i));
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fflush(stdout);
}
for (i = 0; i < nr; i++) {
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struct btrfs_buffer *next_buf = read_tree_block(root,
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btrfs_node_blockptr(c, i));
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struct btrfs_node *next = &next_buf->node;
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if (btrfs_is_leaf(next) &&
btrfs_header_level(&c->header) != 1)
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BUG();
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if (btrfs_header_level(&next->header) !=
btrfs_header_level(&c->header) - 1)
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BUG();
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btrfs_print_tree(root, next_buf);
btrfs_block_release(root, next_buf);
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}
}